I have blocked this number along with their 20 something other numbers.  If you call any of them back, they are not in service.  I have asked them not to call.  The next time they call, I am going to give them a fake address somewhere in the middle of a park or field.  On other sites people have said that they say they have geese not ducks, and they stop phoning....maybe I'll have to give that a try.  The Do Not Call list is very useless as we are on it too and we get calls from solicitors weekly...what a waste of funds manning a national program that does nothing but pay people to take complaints....